package io;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class copyDemo3Buffered {
    public static void main(String[] args)  throws Exception{
        FileInputStream fis =new FileInputStream("v12.jpg");
        BufferedInputStream bis=new BufferedInputStream(fis);
        FileOutputStream fos=new FileOutputStream("v12_cp3.jpg");
        BufferedOutputStream bos=new BufferedOutputStream(fos);
        long start =System.currentTimeMillis();
        int d;
        while((d=bis.read())!=-1){
            bos.write(d);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制完毕，耗时间"+(end-start)+"ms");
        bis.close();
        bos.close();

    }
}
